Regardless of whether you’re using your credit card to buy a laptop or laundry soap, you have rights and responsibilities under the law. Getting a good grip on the safe use of credit cards can help you avoid a credit calamity.

Once identity thieves have your personal information, they can drain your bank account, run up charges on your credit cards, open new utility accounts, or get medical treatment on your health insurance.

Everyone wants to feel safe in their home, so when home security salespeople come knocking, their pitch can be convincing. The Federal Trade Commission (FTC), the nation's consumer protection agency, and your state Attorney General urge you to...